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<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>hogwarts</title>
</head>
<style>
    h1,h2,p
    {
        color:red;
    }
    .eee p{
        color:green;
    }
    p.jjj{
        color:blue;
    }
</style>
<body>
<h1>这是一首简单的诗</h1>
<div class="eee">
    <p>咏鹅</p>
    <div>
        <p>鹅鹅鹅</p>
    </div>
</div>
<div>
    <p class="jjj">静夜思</p>
    <div>
        <p>床前明月光</p>
    </div>
</div>
<h2>结束咯</h2>
</body>
</html>